So how long will it take for new players to realise the game is built around team play?

Yes you can split off from the group when jumping, though it's meant to be used to land say 20 metres away at most so the three of you can cover a single area more effectively. Splitting almost immediately after jumping and deciding your spot 400 metres away is better just means that it's going to take a while for the lot of you to regroup. Considering how you want good loot as soon as you land just so you can survive, that's going to make it longer. If you get killed all on your own, well you may as well end the match there because nobody is going to get to you on time.

If you do pick up a beacon and start running towards a respawner, maybe don't take from the crates that are usually surrounding it. Because when your teammate respawns they will land with nothing and needed the ammo, grenades, armour, ect. a bit more than you do.

And when your teammate is downed close by, don't spend that minute of time scouring the area clean of loot, especially when you've already picked up plenty of decent gear that can help the two of you survive should you encounter an enemy on the way. You know that pinging sound that you keep hearing with the green icon on the screen at all times? That's your teammate growing increasingly agitated as the time ticks down and they see through your eyes as you don't appear to notice.

Bit of a rant really, had the former happen a few too many times and the latter just earlier. I'm okay with a new player not knowing the ropes, we all started there in the beginning. I'm forgiving if you make some rookie mistakes or aren't too high skilled that you end up dying quickly. But if I see you have played enough to get to say level 5, I expect you to have noticed by now that there's no solo mode for a reason.